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The Energy Information Administration reported that the mean retail price per gallon of regular grade gasoline was$3.60. Suppose that the standard deviation was$.10 and that

The Energy Information Administration reported that the mean retail price per gallon of regular grade gasoline was$3.60. Suppose that the standard deviation was$.10 and that the retail price per gallon has a bell-shaped distribution.

NOTE: Please use empirical rule approximations for this problem.

a.What percentage of regular grade gasoline sold between$3.50and$3.70per gallon (to 1 decimal)?

b.What percentage of regular grade gasoline sold between$3.50and$3.80per gallon (to 1 decimal)?

c.What percentage of regular grade gasoline sold for less than$3.80per gallon (to 1 decimal)?

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